[Tails-dev] Please review and merge whisperback:bugfix/filte…

Hi,

Please review and merge bugfix/filter_more_serial_nos in whisperback
master.

This should fix:

- Sanitize IPv6 addresses in WhisperBack
(https://labs.riseup.net/code/issues/6571)
- Whisperback should sanitize DMI
(https://labs.riseup.net/code/issues/6797)
- Whisperback should sanitize more serial numbers
(https://labs.riseup.net/code/issues/6798)

If you want me to just merge this and review the changes from master
just tell me.

Cheers